Patent · US Active

Diatomaceous earth filter apparatus and method

US8992775B2 · kind B2 · utility

4Cited by

25References

4Claims

0Family size

Assignee

Pentair Water Pool and Spa, Inc. · US

Inventors

Robert Frank Swindell · Sanford, US
Leonard Richiuso · Sunnyvale, US
Brian Cox · Charlotte, US

Key dates

Filing date	Oct 31, 2006
Grant date	Mar 31, 2015
Priority date	—
Expiry date	Jul 27, 2030

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D29/96
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention provides an apparatus and method for removing diatomaceous earth and contaminants from a filter and for filtering liquid using diatomaceous earth. Embodiments of the method can include a washdown process, a backwash process, and a filtering process. Some embodiments of the apparatus can include one or more filter cartridges with cartridge tubes to increase flow during the backwash process. Some embodiments of the apparatus can include a backwash sprayer to disturb contaminants during the backwash process. Some embodiments of the apparatus can include a removable lid to access the filter cartridges during the washdown process.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.